, isoneusedbythe beltway snipers. but it is -- it's considered a sporting weapon. some people say it looks like an assault weapon, looks like a military weapon. but it has characteristics that make it suitable for sporting purposes. therefore, it was never banned under the old assault weapon ban, nor is it banned by the connecticut assault weapon ban. but as far as why somebody would want one of these, a lot of people just because they can have one. some people think it's sexy to have one of these things. some people feel it's for self protection. but it's within the law to have one so people feel they can do that. >> mike bushard with us this evening. deb feyerick has other stories making news this evening. deb? >> doctors are monitoring secretary of state hillary clinton for a concussion. she hit her head after she fainted. her office says clinton was dehydrated from a stomach virus. she is resting comfortably at home. she'll work at home next week following her doctor's recommendations. clinton will not testify as had been scheduled thursday about the deadly attack in benghazi,

the impact will be, but, clearly, people wantedtousetheseservices. >> what i've been hearing since i've been on the ground and talking to many residents, so many parents, no matter what their children are. they're struggling to figure out how to tell their children about what's transpired. if -- how much detail to give them and really everyone is dealing with this on an own individual level and parents need to be strong for their kids. >> probably a lot of your viewers all over the country are having those discussions. i don't live here, but my kids were asking me the same things. i have a 7, 5 and 3-year-old. i will tell you that you want to be honest with something like this. and i think this whole -- my daughter wanted to know the names of people yesterday. she wanted to know the names of some of these children and she wanted to know if her school was going to be a safe place to go. and i said this never happened in daddy's school or mommy's school and this happened now but we do all we can to keep you safe. everyone knows their kids best and the graphic details, i think, obviousl

. "sanjay gupta, md" starts right now. >> hello and thanks for beingwithus. asyou may know, i spent the past week immersed in what might be the most upsetting story i think i've ever reported. i want to start by saying, the kind of horrible violence we saw in newtown, connecticut, it isn't new. in fact, the worst school attack ever took place more than 80 years ago in bath, michigan. there was a consolidated school, the pride and joy of that community. it also meant increased property taxes and a farmer became angry about that. so for weeks he put dynamite under the local school and then eventually blew it up. 38 children died. and then he killed himself with another load of dynamite. we'll never truly know for sure why he did all that or what made the young man in newtown unload a rifle into a classroom full of first graders. but i've looked at other school shootings and they just might provide some clues. first thing you notice is when you look around newtown, everyone has that questioning look. why? what did we miss? if anything? no answers yet. just hindsight. so try and make so

psychiatry and the author of this book "almost a psychopath." thanks forjoiningus. i'msure you've been thinking about this a lot. a lot of questions you studied rampage killers and you agree that there isn't just one type that she's shooters fall into, but i guess the question is, are they by definition mentally ill just given the crime they just committed? >> thanks for having me on, sanjay. it's as complicated a picture as you lay out here. and as you point out that there are these different categories of people who engage in these acts of violence. most of whom do not have a serious mental illness and the mast majority of crimes are not committed by people with mental illness. however, a small group of people who are predisposed who have complicating factors of substance abuse and other additional risk factors. >> just by saying that they don't have mental illness, does that mean they weren't diagnosed or they weren't treated? how do you, i mean, do we know for sure they didn't have it? >> well, we don't know for sure, but in general when we look at many of these cases, especially f